Difference between revisions of "Jolson"

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|viewerconfig    = #C [[ GPS 3 ZOOM 12 LOOP 15 ]]
 
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'''Jolson''' (also known as '''Al Jolson''') is a [[period]] [[:Category:Oscillators with period 15|15]] [[oscillator]] consisting of two [[block|blocks]] hassled by two [[pentadecathlon|pentadecathlons]]. It was found by [[:Category:Patterns found by Robert Wainwright|Robert Wainwright]] in November [[:Category:Patterns found in 1984|1984]] and named by [[:Category:Patterns found by Bill Gosper|Bill Gosper]]. A period [[:Category:Oscillators with period 9|9]] version that uses two [[snacker]]s instead of pentadecathlons is also possible (see below), but p14 (by hitting the sides of the pentadecathlons with [[34P14 shuttle]]s) is not possible. It is not possible to create a period 45 version by using one snacker and one pentadecathlon, since the [[spark]]s must be both present at the same time when hassling.
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'''Jolson''' (also known as '''Al Jolson{{refn|group=note|The name is in reference to [https://en.wikipedia.org/wiki/Al_Jolson Al Jolson], the famous American singer.}}''') is a [[period]] [[:Category:Oscillators with period 15|15]] [[oscillator]] consisting of two [[block]]s [[hassle]]d by two [[pentadecathlon]]s. It was found by [[:Category:Patterns found by Robert Wainwright|Robert Wainwright]] in November [[:Category:Patterns found in 1984|1984]] and named by [[:Category:Patterns found by Bill Gosper|Bill Gosper]].
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The hassling mechanism requires two [[domino]] [[spark]]s, constantly 3 generations apart, provided by [[sparker]]s of period 9 or above (e.g. [[Merzenich's p31]]). A period [[:Category:Oscillators with period 9|9]] version that uses two [[snacker]]s is possible (see below), but p14 (with [[tetradecathlon]]s) is impossible.
  
 
==Image gallery==
 
==Image gallery==
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|[[Image:Jolsonorigin.png|framed|One of the phases of Jolson, which led to its name]]
 
|[[Image:Jolsonorigin.png|framed|One of the phases of Jolson, which led to its name]]
 
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==Notes==
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<references group="note" />
  
 
==External links==
 
==External links==

Revision as of 09:32, 15 August 2019

Jolson
x = 13, y = 19, rule = B3/S23 b2o6b2o$o2bo4bo2bo$o2bo4bo2bo$o2bo4bo2bo$b2o6b2o3$7bo$5bo2bob2o$6b2o2b 2o3$6b4o$5b6o$4b8o$3b2o6b2o$4b8o$5b6o$6b4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 3 ZOOM 12 LOOP 15 ]]
Pattern type Oscillator
Number of cells 42
Bounding box 18×22
Period 15
Mod 15
Heat 47.9
Volatility 0.98
Strict volatility 0.98
Discovered by Robert Wainwright
Year of discovery 1984

Jolson (also known as Al Jolson[note 1]) is a period 15 oscillator consisting of two blocks hassled by two pentadecathlons. It was found by Robert Wainwright in November 1984 and named by Bill Gosper.

The hassling mechanism requires two domino sparks, constantly 3 generations apart, provided by sparkers of period 9 or above (e.g. Merzenich's p31). A period 9 version that uses two snackers is possible (see below), but p14 (with tetradecathlons) is impossible.

Image gallery

The period 9 version of Jolson
Download RLE: click here
One of the phases of Jolson, which led to its name

Notes

  1. The name is in reference to Al Jolson, the famous American singer.

External links

  • 42P15.1 at Heinrich Koenig's Game of Life Object Catalogs
  • Al Jolson at Wikipedia